#!/usr/bin/node

const log = console.log,
      Dog = require('./02-dog.js');
let taidi = new Dog('taidi',4),
    zangao = new Dog('zangao',8);
taidi.on('bark',onBark);
zangao.on('bark',onBark);

function onBark(){
  log('%s barked! energy:%s ',this.name(),this.energy());
}
